Charging dock



FIG. 1 is a perspective view of a charging dock showing our new design;

FIG. 2 is a right side view thereof, the left side view being a mirror image of the right side view;

FIG. 3 is a rear view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a front view thereof.

The broken lines shown in the drawings depict environmental structure and portions of the charging dock that form no part of the claimed design. 

CLAIM The ornamental design for a charging dock, as shown and described. 